Magnetic bearing with constant-current source

Details Magnetic bearing with constant-current source Magnetic bearing with constant-current source

1995-05-25

1997-10-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02N 709

Patent

active

056820712

ABSTRACT:
A magnetic bearing supports an object such as a rotor in a stable, contactless position. The bearing has electromagnets, each associated with a respective current control means (e.g., amplifier or power switch), disposed to exert magnetic forces in various directions to levitate the rotor. A constant-current source feeds a constant (total) current the electromagnets in parallel. Sensing means detect movements of the rotor from the position and inform a controller that responds by controlling the respective current to each electromagnet to maintain the rotor in position.

REFERENCES:
patent: 3937533 (1976-02-01), Veillette
patent: 4417772 (1983-11-01), Robinson
patent: 4481452 (1984-11-01), Kitano et al.
patent: 4723735 (1988-02-01), Eisenhaure et al.
patent: 5066879 (1991-11-01), Yamamura
patent: 5243491 (1993-09-01), Van Eijk et al.
patent: 5262692 (1993-11-01), Williams et al.
patent: 5277948 (1994-01-01), Boon et al.
patent: 5319273 (1994-06-01), Hockney et al.

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